Pl help it’s for a grade

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000